cbd oil effects on liver

Cbd oil effects on liver

However, there’s a risk of potential drug interactions, as CBD is metabolized by the same group of enzymes that process active ingredients in pharmaceuticals. As an inhibitor of those enzymes, CBD can lead to either subtherapeutic effects or substance toxicity when taken along with medications for liver function. That’s why we recommend consulting a doctor before adding CBD oil to your routine.

However, inflammation in the liver causes the endocannabinoid to be very active in this area. Unfortunately, an overactive endocannabinoid system plays a role in the development of fatty liver disease (3).

Long story short, CBD is generally safe for your liver enzymes if you don’t exceed the dose of 20 mg CBD/kg/day.

For example, one study found that 10% of the subjects had higher levels of liver enzymes and had to stop using CBD for this reason. Other studies suggest that CBD can improve liver function. Since CBD is metabolized by the liver — as shown by the studies done on Epidiolex — patients with liver diseases should limit over-the-counter (OTC) medications to avoid potential CBD-drug interactions and reduce the stress experienced by the liver.

Side Effects of CBD

The liver is a fundamental detoxifying organ that performs many important functions to keep the body in the optimum state. It plays a role in digestion, detoxification, drug metabolism, and more.

CBD has a remarkably good safety profile. Researchers have tested the efficacy and safety of CBD in humans using doses as high as 1,500 mg – 3000 mg CBD daily.

CBD is the modulator of CB1 and CB2 receptors. In simple English, it keeps them from going crazy by stopping the compounds that make these receptors go haywire in the liver.

CBD Oil for Viral Hepatitis

There are plenty, to be honest.

As mentioned earlier in the article, CBD has an excellent safety profile. People turn to CBD because it’s a low-risk alternative to conventional treatment options for liver disease. That being said, it has a few relatively mild effects when consumed in high doses, including:

CBD was extracted from cannabis resin (hashish) and purified as previously reported (Gaoni and Mechoulam, 1971) and was dissolved in a vehicle solution consisting of ethanol, emulphor and saline at a ratio of 1:1:18, respectively, and was injected in a single dose of 5 mg·kg −1 i.p, 1 day after either NS or TAA treatment. Similarly, the CBD-related vehicle (the same mixture without CBD) was administered at the same time points following either NS or TAA treatment. A dose of 5 mg·kg −1 CBD was chosen based on the studies done by Magen et al. (2009; 2010;) and on preliminary experiments done in our laboratory, which demonstrated that this does produced a maximal effect compared to 1 and 10 mg·kg −1 . Four groups of animals were studied: control naïve animals treated with either CBD or its vehicle, and corresponding TAA-treated animals.

Induction of hepatic failure

Hepatic encephalopathy (HE) is a syndrome observed in patients with end-stage liver disease. It is defined as a spectrum of neuropsychiatric abnormalities in patients with liver dysfunction, after exclusion of other known brain diseases, and is characterized by personality changes, intellectual impairments and a depressed level of consciousness associated with multiple neurotransmitter systems, astrocyte dysfunction and cerebral perfusion (Riggio et al., 2005; Magen et al., 2008; Avraham et al., 2006; 2008a; 2009; Butterworth, 2010). Subtle signs of HE are observed in nearly 70% of patients with cirrhosis and approximately 30% of patients dying of end-stage liver disease experience significant encephalopathy (Ferenci, 1995). HE, accompanying the acute onset of severe hepatic dysfunction, is the hallmark of fulminant hepatic failure (FHF), and patients with HE have been reported to have elevated levels of ammonia in their blood (Stahl, 1963). In addition, the infiltration of tumour necrosis factor-α-secreting monocytes into the brain of bile duct-ligated mice, a model of chronic liver disease, has been found 10 days after the ligation, indicating that neuroinflammation is involved in the pathogenesis of HE. This infiltration was shown to be associated with activation of the cerebral endothelium and an increase in the expression of adhesion molecules (Kerfoot et al., 2006).


An increased level of 5-HT in the brain of rats after TAA administration was reported by Yurdaydin et al. (1990). In addition, there is indirect evidence that this increase is related to decreased motor activity, as the nonselective 5-HT receptor antagonist methysergide increased motor activity in TAA-injected rats, while the selective 5-HT2 receptor antagonist seganserin did not (Yurdaydin et al., 1996). Likewise, we found that the level of 5-HT was increased following TAA administration and this was restored after CBD treatment ( Figure 5 ). In parallel, motor activity was decreased following TAA injection and increased after CBD treatment, indicating a link between the increase in 5-HT and decrease in motor activity. Hence, it seems that CBD reversed the increased 5-HT level in the brains of TAA mice and thus reversed the decrease in their motor activity. A possible mechanism can be activation of 5-HT1A receptors by CBD (Russo et al., 2005; receptor nomencalture follows Alexander et al., 2008), as these receptors have been reported to inhibit 5-HT synthesis (Invernizzi et al., 1991). We have shown that the effects of CBD in a chronic model of HE, bile duct ligation, are mediated via the 5-HT1A receptors (Magen et al., 2010), and in an earlier study with the same model we demonstrated that the effects of CBD can be also mediated via A2A adenosine receptors (Magen et al., 2009). Thus, the effects of CBD can be mediated by 5-HT1A or/and A2A adenosine receptors. We think that in the current study the effects of CBD were mediated by the 5-HT1A receptor since activation of the receptor by CBD caused depletion of 5-HT ( Figure 5 ). In our previous studies we showed that cognition is multifactorial and not dependent only on 5-HT levels, and therefore there is no direct correlation between cognition and 5-HT levels.